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Mercury/Mariner 3.0L V6 Outboard Alternator 12V 50A, Ref 821663A1 | Recmar REC821663A1

REC821663A1

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  • Image of an alternator on a white background.
  • Image of an alternator on a white background.
£144.88 GBP
£144.88 GBP
Tax included. Shipping calculated at checkout.
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Product Specifications and Features

This 12V 50A alternator is a direct-fit replacement for Mercury/Mariner 3.0L V6 2-stroke outboard engines that use OEM alternator kit 821663A1. Supplied as Recmar REC821663A1, it’s intended to restore reliable battery charging when the correct match is confirmed.

Before ordering: confirm your engine model/serial range and match the part number on the alternator currently fitted.

  • Part: Alternator (with internal regulator)
  • Output: 12V / 50A
  • Pulley: Single V-belt (V-groove) pulley
  • Fits: Mercury/Mariner 3.0L V6 outboards (2-stroke), commonly 225 (Carb/EFI), 250 (EFI) and 300 (EFI) applications
  • OEM cross-references: Mercury/Quicksilver 821663A1, 821663, 821663-1
  • Other interchanges: Denso 101211-3020, 101211-3021; Sierra 18-6449
  • Aftermarket reference: Recmar REC821663A1

Fitment varies by engine version and serial range. Always match the OEM/reference numbers before purchase to avoid ordering the wrong unit.

Shipping Information

All orders ship from the UK. Orders placed Monday–Thursday before 12:00pm are processed same day. Orders placed Friday after 12:00pm through Sunday are processed the following Monday. Processing times vary by stock location.

Out of stock items can be back-ordered with a typical 3–4 week lead time.

If an item shows "Dispatch Available Today" and you order after 2pm UK time, processing begins the next business day.

All times are in UK BST.
Mercury/Mariner 3.0L V6 Outboard Alternator 12V 50A, Ref 821663A1 | Recmar REC821663A1

£144.88 GBP

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